Given the system:

3x + y + z + v = b1

x - y + z + v = b2

x + y - z + v = b3

x + y + z - v = b4

Fint the values for b1,b2,b3,b4 for which the system is consistent, in the form:

a1 * b1 + a2 * b2 + a3 * b3 + a4 * b4 = 0

and the answer is the row vector [a1,a2,a3,a4].

Solve the system with the values previously found, in the form:

|x| | b1 |

|y| | b2 |

|z| = C | b3 | + t * d

|v| | b4 |

Thanks!